Improvement in brick-molds



S. POLWE-LL.

Brick-Mold.

N0. 198,096. Patented Dec. 11,1877.

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INVENTOR I h PETERS, FHOTQ LITHOGRAPHER, WASHINGTON, D C.

UNITED STATES PATENT OEEIoE.

SAMUEL FOLWELL, OF MEMPHIS, TENNESSEE.

IMPROVEMENT IN BRICK-MOLDS.

Specification forming part of Letters Patent N 0. 198,096, datedDecember 11, 1877 application filed May 31, 1877.

To all whom it"may concern:

Be it known that I, SAMUEL FoLwELL, of Memphis, in the county of Shelbyand State of Tennessee, have invented certain new and usefulImprovements in Brick-Molds, of which the following is a specification:

In this invention, the bottom of the mold has a vertical movement onsuitable guides, and is pressed outward from the body of the mold byspiral springs surrounding said guides. The play of the bottom islimited by temperscrews.

The object of the invention is to insure a proper shape to the brick,and render it easily detachable from the mold.

In the accompanying drawing, Figure l is a perspective view of myimproved mold. Fig. 2 is a vertical section on the line 2 2, Fig. 3; andFig. 3 is an end view of the mold.

A may represent the body of the mold, divided by the partition A intotwo parts. B is the movable bottom, having a vertical play on theguides. G D are spiral springs, coiled around the guides, as shown, andserving to force the bottom from the body of the mold. E aretemper-screws, passing through the bottom, and engaging in the body ofthe mold. By the proper adjustment of the screws the play of the movablebottom is regulated as desired.

The clay is molded in the usual way, as when bottomless or solid-bottommolds are used. Then the off-bearer takes the mold, and, by inverting itand applying pressure at each end, closes the bottom down to thepartition, to insure square edges and corners to the brick and even itssurface. The pressure is now removed, and the spiral springs, aided, ifnecessary, by an upward pressure by the operator s fingers, force thebottom of the mold away from the brick, as shown in dotted lines, Fig.2, thus allowing a circulation of. air between them. This leaves thebrick in a condition to be easily detached from the mold, as it has onlythe friction on the sides and ends to overcome. i

I am aware that brick-molds have heretofore been made with movablebottoms. This, therefore, I do not broadly claim; but

What I do claim as new, and desire to secure by Letters Patent, is-

1. The combination of the movable bottom B, guides G, and spiral springsD, all arranged and operating as herein set forth, for the pur posespecified.

2. The combination, to form a brick-mold, of the body A, bottom B,guides O, springs D, and temper-screws E, all as set forth.

SAMUEL FOLWELL.

Witnesses:

A. F. SoHULzE, W. JAMES.

